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Additional Photos of this Cadillac STS

2009 Cadillac STS Review

This car review is specific to this model, not the actual vehicle for sale.Great driving luxury car, from V6 to supercharged V8.

IntroductionThe Cadillac STS represents an American challenge to the technology, quality and great driving attributes of the high-end imports. Available with rear-wheel or all-wheel drive, with engines ranging from a responsive and efficient V6 to a supercharged V8, the STS delivers a lot of luxury, technology and performance with a wide range of drivetrain and powerplant choices.

The 3.6-liter direct-injection V6, developing 302 horsepower and matched with a six-speed automatic transmission, is standard equipment. There is also a 4.6-liter V8 with 320 horsepower and, at the top, the supercharged 4.4-liter V8 of the STS-V that makes 469 horsepower and delivers stunning performance. All STS engines are of aluminum construction, have double overhead camshafts and four valves per cylinder and benefit from variable valve timing to enhance both performance and operating efficiency.

STS safety technologies include Cadillac's Lane Departure Warning and Side Blind Zone Alert systems, plus a sophisticated StabiliTrak electronic stability control system that uses steering as well as brake and throttle control to avoid dangerous skids.

The interior of the STS is superb, with comfortable but supportive seats that are infinitely adjustable, ample storage space, and superior sound systems. State-of-the-art occupant safety comes standard as well. Entertainment systems include 15-speaker Surround Sound.

The STS is unmistakably a Cadillac, but it's also a four-door performance sedan for people who like to drive. The STS offers a choice of suspensions, from the standard setup designed for smooth, comfortable commuting to an active performance suspension that instantly adjusts to any driving situation, whether cruising through a sea of potholes or accelerating around a sweeping turn. Rear-wheel drive provides the balance and control that serious enthusiasts demand, while all-wheel drive can be very beneficial in bad weather.

Changes to the STS for 2009 are minor.

LineupThe Cadillac STS comes with a choice of V6 ($46,410) or V8 ($55,910) engines. The high-performance STS-V ($81,360) comes with a supercharged V8. All come with six-speed automatic transmissions, although the supercharged STS-V uses a heavy-duty unit.

All-wheel drive is available with the V6 ($2,295) and the V8 ($1,550), but with the V8 it's available only with the high-end Premium Luxury Performance Package. All-wheel drive is not available with the STS-V.

A Performance Handling Package ($1,600) is available that includes StabiliTrak with the high-performance Brembo brakes and chrome-plated wheels fitted with P255/45R18 summer tires. On AWD V8s, StabiliTrak includes active steering.

A new Platinum Edition features special paint, trim, wheels, Tuscany leather and a wide range of other features. The STS-V comes with a higher level of standard equipment, including EZ Key with remote start, XM Satellite Radio, rear AV jacks, rear park assist, the Lane Departure Warning System, leather seats with suede inserts, and olive ash burl wood and aluminum interior accents. Special paint and the engine block heater are the only options; the sunroof can be deleted for credit.

Safety features that come standard on all models include dual two-stage frontal airbags, front seat-mounted side airbags, and front-and-rear side-curtain airbags. Four-wheel anti-lock brakes are standard, along with StabiliTrak electronic stability control. Tire-pressure monitors are standard, as is OnStar; its operators send out the rescue squad if your airbag goes off and you don't respond to calls.

Lane Departure Warning uses a camera located between the inside rearview mirror and the windshield to detect lane markings on the road and alert the driver when the vehicle inadvertently strays from the intended lane. Side Blind Zone Alert uses radar sensors behind the rear fascia that signal an audible and visual alert if objects are detected where it might be difficult for the driver to see them. Enhanced StabiliTrak with active steering is available only on V8s with AWD.

WalkaroundThe Cadillac STS has a distinctive, crisp profile with an almost box-like silhouette that somehow still looks aerodynamic. Perhaps it's the gently curved A-pillars and C-pillars that tend a bit more toward art than science. Sharply contoured lower rocker panels tracking rearward from the front fascia's bottom edge pull the body down, adding a stylistic ground-effects look. It's all very consistent with Cadillac's art and science design motif.

Up front the STS has a boldly traditional eggcrate grille with Cadillac's trademark vertically stacked headlamps.

Chromed air extractor vents mark the clean flanks, and more subtle chrome accents adorn the door handles and rocker flares.

The rear has vertical taillights bracketing a tall, squared-off trunk lid. Recessed into the trunk's rear surface is a trapezoidal inset, big enough for European-spec license plates, housing large backup lights at the left and right extremes. Dual polished aluminum exhaust tips exit below the rear bumper.

The super-performance STS-V avoids the retro look up front with polished stainless wire-mesh grilles above and below the front bumper, and a power bulge in its engine hood. Its deeper front air dam incorporates brake scoops below the fog lights. The fender vents seem more in line with the performance model's extroverted character. Its 10-spoke wheels are unique; its rear spoiler more obvious. It's further distinguished with V-Series badging and Supercharged lettering on the front doors.

InteriorThe Cadillac STS cabin is warmer in appearance than the exterior, with soft leather surfaces complemented by warm wood accents. Those wood accents cost extra, but we much prefer them over the standard brushed aluminum trim, which looks and feels cold and reflects sunlight to the point of annoyance. Our advice: Order the wood.

The seats in all models are refreshingly supportive, for a Cadillac, without being overly firm. Arm rests and head restraints are a degree or two softer than the cushions and side bolsters, boosting the comfort factor a couple notches. All essential controls are within easy reach, although there could be more clearance between the lower door panels and seat bottom to access the front seat adjusters. For this reason, we especially liked the seat memory feature, which often saved us from having to reach down for the adjusters. The interior is noticeably roomier than that of the marginally smaller CTS.

Instruments are easily scanned, white-on-black round analog gauges, with a large nested tachometer and speedometer between the smaller fuel and engine temperature gauges. The speedometer changes between English and metric electronically, so there's only one set of numbers around its circumference.

Cruise control and running lights are managed via a stalk on the left side of the steering column, windshield wipers and washers with a stalk on the right. Buttons in the steering wheel spokes provide redundant controls for audio and driver information functions. The steering wheel hub looks substantial, and even a bit futuristic. The available head-up display projects speed and other key information onto the windshield, so that the driver does not need to look down at the gauges.

The available Bose 5.1 stereo incorporates Surround Sound with 15 speakers. An integrated six-disc CD/DVD changer plays DVD-A, CD, and MP3 formats. An eight-inch VGA-quality touch screen and advanced navigation, Bluetooth phone capability, and OnStar with advanced voice recognition are all part of the package. A word of caution, however: the top-level stereo system, although delivering superb Surround Sound, is multi-tasked with a navigation system that, in combination, demands study of the owner's manual to operate with any degree of alacrity and confidence.

OnStar features a fully integrated GPS navigation system called Turn-by-Turn Navigation. Turn-by-Turn allows drivers to talk to a live advisor, who can download complete step-by-step directions to the vehicle through the OnStar system. These audio directions then automatically play through the vehicle's stereo as needed (after the OnStar operator hangs up), triggered by the system's GPS capabilities. This enables drivers to be led to their destinations while keeping their hands on the wheel and eyes on the road.

Storage cubbies include map pockets in all four doors. The front center console is deep and wide and pre-wired for cellular and Bluetooth (to wirelessly tie a cell phone into the car's audio system, allowing hands-free operation). The glove box, though, is barely sufficient to hold the navigation DVD case and owner's manual. Two cup holders are provided front and rear. The trunk is fully lined, with articulated, gas-pressurized struts.

Fit and finish are top grade, with notably tight trim tolerances. Careful attention was paid to reducing noise, vibration and harshness, with remarkable and commendable success. Specially laminated windshield and front door glass, wind tunnel-tuned outside mirrors and high-density/low-mass sound-deadening padding make this a quiet car even by Cadillac standards.

The Platinum Edition features hand-cut and hand-sewn leather on the instrument panel, door trim and center console areas. The steering wheel is heated. The seats are fully covered with a semi-aniline leather called Tuscany. Wood trim is an olive ash burl stained a saddle shade. Chrome accents highlight the instrument panel and doors. Even the floor mats are upgraded, and there are Platinum badges on the door sills. Only two interior colors are offered: Cocoa over Cashmere or all-Ebony.

The V6 delivers 302 horsepower at 6300 rpm and 272 pound-feet of torque at 5200 rpm. It delivers good fuel efficiency, while its direct injection technology enables a 25-percent reduction in cold-start hydrocarbon emissions. With direct injection, fuel is sprayed directly into the cylinder, rather than into the intake port. As the fuel vaporizes in the cylinder, the air and fuel mixture is cooled. This enables the use of a higher, 11.3:1 compression ratio for better thermodynamic efficiency. The 3.6-liter V6 also features an isolated fuel-injector system, which helps reduce engine noise.

The six-speed automatic that comes on all models features a generous 13.88:1 maximum overall first-gear ratio for rapid launching off the line (13.11:1 with AWD), while also providing two overdrive ratios that decrease engine rpm and reduce noise levels while cruising at highway speeds.

The V8 generates 320 horsepower at 6400 rpm, and 315 pound-feet of torque at 4400 rpm. Both the 3.6-liter V6 and 4.6-liter V8 use electronic throttle control, to match the engine's performance to a variety of driver demands, from sedate highway cruising to rambunctious back-road motoring.

The STS-V's 4.4-liter supercharged V8 pumps out 469 horsepower, making it the most powerful production engine in Cadillac history. It makes 439 pound-feet of torque, with 90 percent of it available in a wide sweep from 2200 to 6000 rpm. This enormous thrust is delivered smoothly through the six-speed automatic transmission. However, the heavy-duty upgrades found in virtually every dynamic element of the V-model STS, including harder-riding lower-profile tires, make the STS-V suitable only for those willing to sacrifice some comfort in return for jetting from 0 to 60 mph in less than five seconds. There's also the STS-V's gas guzzler tax to consider.

For most us, then, the sporty setup will be the STS V8 with the optional performance handling package. Nudge the shift lever over to the right, into the manu-matic gate, and the selected gear will hold all the way up to the engine's redline, and this car can be taken to extremes heretofore beyond the reach of sedans wearing the Cadillac wreath and crest. The suspension engineers have demonstrated they understand the difference between too stiff and responsively firm. Thankfully, all the sound filtering and deadening doesn't keep the V8's throaty exhaust note out of the cabin.

The all-wheel-drive system is a hard package to top, complemented by Magnetic Ride Control and the latest generation StabiliTrak, though this adds some weight. Body lean in even the tightest switchbacks is minimal, and mild dips barely give occupants' stomachs any flips. Biasing 60 percent of the power to the rear wheels gives the all-wheel-drive STS the sporty dynamics of rear-wheel drive while sending enough power to the front wheels to help in bad weather.

The electronic steering the STS uses is a delight, its only shortcoming a slight softness on-center. The STS tracks well into and through corners, especially with the 18-inch, low-profile tires.

Active steering, available exclusively on V8 models with AWD, is integrated into the StabiliTrak stability control electronics. In addition to controlling brakes and reducing engine power, StabiliTrak with active steering can turn the front wheels to reduce skidding when rear wheels lose traction. The system includes a new steering motor assembly combined with computer-driven electronic controls that measure wheel slippage at all four wheels independently during acceleration, braking and adverse road conditions.

Brakes on the STS are up to the car's potential, with a firm pedal and a feel that's reassuringly linear. All of the various Performance packages include four-piston Brembo calipers, with quite large vented brake rotors both front and rear.

The Lane Departure Warning system engages above 35 mph. A green light indicates that the system is turned on and working. Should the driver cross a detected lane marking without signaling, the light flashes amber while an alarm beeps three times. The system is designed to alert the driver to take appropriate action to move the vehicle back into the correct lane. To avoid nuisance alerts, the system is designed to not provide an alert if the turn signal is on or if the driver makes a sharp maneuver. The driver can switch it off, in which case the light goes out entirely. The Side Blind Zone Alert system uses radar to sweep an 11-foot zone on either side of the vehicle; in other words, about one lane over. The zone starts at each side mirror and reaches back about 16 feet. With the system engaged, an amber symbol lights up in the outside mirror whenever another vehicle enters this blind zone. Cadillac cautions that the system is not designed to detect vehicles outside of the side blind zone that may be rapidly approaching, or pedestrians, bicyclists or animals. It's designed to ignore stationary objects, such as fire hydrants or parked cars. In addition, the system displays do not come on while the vehicle is approaching or passing other vehicles.

All three engines represent the latest GM thinking, with double overhead cams, four valves per cylinder and variable valve timing. Called VVT, this latter system continuously varies valve operation to generate the most power from the least amount of fuel with the lowest emissions possible. Torque is what most of us experience as power in everyday driving; torque is what gets a car moving in the first place, as when accelerating from an intersection. Recognizing that, Cadillac engineers designed the STS engines to generate lots of torque throughout the rev range for responsive performance at all engine speeds.

SummaryThe Cadillac STS offers a smooth and powerful driving experience with warm and luxurious accommodations. The supercharged STS-V delivers serious performance but sacrifices some comfort and drivability. The STS V8 model with the Performance Package offers a nice balance. We appreciated the all-wheel-drive model for its all-weather capability while maintaining the enjoyable sporty handling. People who enjoy getting where they're going as much as, if not more than, being there, but who pine for luxury touches and good old American V8 power, need no longer compromise.

NewCarTestDrive.com correspondent Tom Lankard reported on the STS, with Greg Brown reporting on the STS-V, and John F. Katz reporting on the styling revisions.

Model TestedCadillac STS V8 ($56,345).The Cadillac STS is a luxury car for people who like to drive. It provides the latest in luxury and comfort features as well as smooth, efficient power and confident handling. The Cadillac STS comes with a 302-hp 3.6-liter V6 engine or a 320-hp 4.6-liter V8. Available with rear- or all-wheel drive it is controlled by a six-speed automatic transmission. Standard equipment includes dual-zone automatic climate control, OnStar telematics, Stabilitrak electronic stability control, and rear park assist. Optional features include automatic headlamp high-beam control, lane departure warning, high-intensity headlights, and adaptive cruise control. For 2009, the Cadillac STS is a carryover from 2008.

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